Unfortunately Chennai? Do you know that Chennai Central is almost entirely north indian, generational folks from Gujarat, Rajasthan, MP, Bombay, Kolkata, Bihar etc (Purusawalkam, Sowcarpet, etc ). Who have left their homes and have settled down in Chennai for almost a century now and continue to do so. You'll be surprised to meet them because they might be more fluent in Tamil than the locals. There is a reason why people leave the north to settle down south, and not vice versa.
If "Unfortunately Chennai" is your attitude then stay the fk away because you will get your ass beat.